US3861853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing carbon monoxide formation in catalytic heaters and burners and improved catalytic structure for use therewith
Assignee: Prototech Inc
•
Filing: 1972-12-29
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Granted: 1975-01-21
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Expires: 1992-12-29
Abstract
Abstract This disclosure is concerned with reducing carbon monoxide formation in catalytic heaters and burners employing preferably platinum catalytic surfaces to which hydrocarbon gaseous fuel is diffused, and which are treated with carbonate, acetate, borate, sulphate, nitrate, hydroxide, and chloride salts of certain alkali earth metals.
Inventors
- 👤 Henry G Petrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A method as claimed in claim 1 and in which the amount of applied metal of the metal salt is in the range of from about 1 to 12 moles per mole of catalyst.
Claim 2
Dependent Claim
15 words
A method as claimed in claim 2 and in which said catalytic surface comprises platinum.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 3 and in which said metal salt is potassium borate applied in an amount in the range of from about 2 to 9 moles of potassium per mole of platinum catalyst.
Claim 4
Dependent Claim
68 words
A carbon-monoxide-formation-reducing catalytic structure for combusting a hydrocarbon gaseous fuel having, in combination, a mat-like structure for receiving hydrocarbon fuel, such structure being provided with an external platinum-containing surface exposed to the air, and applied to said surface, salts selected from the group consisting of carbonates, acetates, borates, sulphates, nitrates, hydroxides and chlorides of alkali earth metals selected from the group consisting of Cs, Rb, K and Na.
Claim 5
Dependent Claim
38 words
A carbon-monoxide-formation-reducing catalytic structure as claimed in claim 5 and in which the amount of the metal of the metal salt applied is in the range of from about 1 to 12 moles per mole of platinum catalyst.
Claim 6
Dependent Claim
20 words
A carbon-monoxide-formation-reducing catalytic structure as claimed in claim 5 and in which said mat-like structure comprises an alumina-silicate fiber structure.
Claim 7
Dependent Claim
38 words
A carbon-monoxide-formation-reducing catalytic structure as claimed in claim 5 and in which said platinum is in the form of particles formed from decomposition and then reduction of a platinum salt containing two moles of SO3 per platinum atom.
Claim 8
Independent Claim
75 words
A method of reducing carbon monoxide formation in the catalytic combustion of a hydrocarbon gaseous fuel, that comprises, diffusing a hydrocarbon gaseous fuel into a mat, disposing a catalytic surface exposed to air on an outer surface of the mat, and providing along said surface during combustion free electrons from low-ionization potential alkali metals to scavenge radicals from the hydrocarbon fuel being catalytically combusted, and thus to slow down and more orderly burn the fuel.
Claim 9
Dependent Claim
68 words
A carbon-monoxide-formation-reducing catalytic structure for combusting a hydrocarbon gaseous fuel having, in combination, a mat-like structure for receiving hydrocarbon fuel, such structure being provided with an external palladium-containing surface exposed to the air, and applied to said surface, salts selected from the group consisting of carbonates, acetates, borates, sulphates, nitrates, hydroxides and chlorides of alkali earth metals selected from the group consisting of Cs, Rb, K and Na.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |